Vintage 1/20 12K Gold Filled Mushroom Lapel Pushback Pin Crosby Jewelers NJ

Vintage 12K Gold Filled Mushroom Lapel Pushback Pin * Estate Find * In box that fits but unknown if this is the original box. * Original owner was from the Rutherford, NJ area * .65" x .63" * See there is some darkening of the finish on the pin. I have NOT attempted to clean it.